Impact resistant layer for a circuit board
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsSatoshi Yoshimoto, Shigeru Nakata, Noboru Takama, Minoru Taniguchi
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Abstract
A resist film for protecting a circuit pattern is coated onto a circuit pattern formed on a circuit board, and further, a part of the resist film with which another unit comes into contact is coated with a thermosetting film. Namely, the other unit is brought into contact with a part of the circuit pattern coated with the thermosetting film, and thus, the other unit and the resist film do not come into contact with each other directly, regardless of whether or not the other unit has a high temperature.
Claims7
A circuit board comprising:
- a base film;
- a circuit pattern formed on the base film;
- a resist layer coated on the circuit pattern for protecting the circuit pattern;
- and
- an exterior thermosetting layer coated on at least a portion of the resist layer, the thermosetting layer having an interior surface contacting the resist layer and an exterior surface exposed over the entire thermosetting layer for protecting the underlying resist layer and circuit pattern layer from wear.
An electronic control element comprising:
- an intermediate housing comprising a top cover and an intermediate base plate;
- a circuit board within said intermediate housing, said circuit board comprising:
- a base film;
- a circuit pattern formed on the base film;
- a layer of resist material on the base film overlying the circuit pattern;
- and
- an exterior layer of thermosetting material on at least a portion of the resist layer for protecting the underlying layers from wear, the thermosetting layer having an interior surface contacting the resist layer and an exterior surface exposed over the entire thermosetting layer;
- means on the housing for engaging said circuit board;
- and
- said thermosetting material being disposed on portions of the resist layer where the engaging means engages said circuit board.
Dependencies are inferred from the claim text.